Input device for three-dimensional control

A tracking system, comprising:

• a display portion secured to a base, the display portion including a display screen;
• an input device comprising an ultrasonic speaker configured to output data;
• an array of ultrasonic microphones disposed on the display portion configured to receive the data from the ultrasonic speaker;
• a sensor disposed on the display portion and configured to detect an angle of the display screen relative to the base;
• and
• a processor configured for determining a position based on the data collected by the array of ultrasonic microphones and the detected angle of the display screen.

A three-dimensional control system, comprising:

• an input device comprising:
• an input sensor;
• an inertial measurement unit (IMU) sensor;
• and
• an ultrasonic speaker;
• a computing device including a display portion and a base;
• an array of at least three ultrasonic microphones fixed to the display portion, the array of at least three ultrasonic microphones being configured to receive ultrasonic waves output by the ultrasonic speaker, wherein at least three ultrasonic microphones of the array of at least three ultrasonic microphones lie in a first plane;
• and
• at least one ultrasonic microphone fixed to the base and lying in a second plane;
• wherein the computing device is configured such that combined output from the IMU sensor and the ultrasonic speaker, when received by the computing device, is sufficient to detect a position of the input device relative to the computing device.